All-sky distributions of all novae detected by eROSITA (red), novae from the western Galactic hemisphere (blue), and upper limits for all non-detected novae in both hemispheres (grey). Distributions of age, distance, interstellar hydrogen column, and X-ray flux (0.2–2.3 keV) are shown. All-sky detected novae and upper limits include eastern Galactic hemisphere results reported in Galiullin & Gilfanov (2021).